fix: 修复utf8的校验和json返回类型

src/db.cc

@@ -5,6 +5,7 @@
 #include "easylogging++.h"
 
 #include "wechat_function.h"
+#include "utils.h"
 using namespace std;
 
 namespace wxhelper {
@@ -117,8 +118,16 @@ int DB::Select(DWORD db_hanle, const char *sql,
     vector<string> item;
     for (size_t i = 0; i < it.size(); i++) {
       if (!it[i].is_blob) {
-        string content(it[i].content);
-        item.push_back(content);
+        bool is_utf8 = Utils::IsTextUtf8(it[i].content, it[i].content_len);
+        if (is_utf8) {
+          string content(it[i].content);
+          item.push_back(content);
+        } else {
+          string base64_str =
+              base64_encode((BYTE *)it[i].content, it[i].content_len);
+          item.push_back(base64_str);
+        }
+
       } else {
         string b64_str =
             base64_encode((BYTE *)it[i].content, it[i].content_len);

src/http_handler.cc

@@ -588,7 +588,7 @@ void HttpHandler::HandlerRequest(struct mg_connection *c, void *ev_data) {
       ret = res.dump();
     }
     if (ret != "") {
-      mg_http_reply(c, 200, "", ret.c_str(), 0, 0);
+      mg_http_reply(c, 200, "Content-Type: application/json\r\n", "%s\n", ret.c_str());
     }
   } else {
     mg_http_reply(c, 500, NULL, "%s", "Invalid URI");

src/utils.cc

@@ -1,7 +1,6 @@
-#include "pch.h"
-#include "utils.h"
-
+#include "utils.h"
 
+#include "pch.h"
 
 namespace wxhelper {
 std::wstring Utils::UTF8ToWstring(const std::string &str) {
@@ -19,7 +18,7 @@ std::wstring Utils::AnsiToWstring(const std::string &input, DWORD locale) {
     MultiByteToWideChar(CP_UTF8, 0, input.c_str(), -1, &temp[0], wchar_len);
     return std::wstring(&temp[0]);
   }
-  
+
   return std::wstring();
 }
 
@@ -102,8 +101,6 @@ void Utils::Hex2Bytes(const std::string &hex, BYTE *bytes) {
   }
 }
 
-
-
 bool Utils::IsDigit(std::string str) {
   if (str.length() == 0) {
     return false;
@@ -119,7 +116,8 @@ bool Utils::IsDigit(std::string str) {
 bool Utils::FindOrCreateDirectoryW(const wchar_t *path) {
   WIN32_FIND_DATAW fd;
   HANDLE hFind = ::FindFirstFileW(path, &fd);
-  if (hFind != INVALID_HANDLE_VALUE  && (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
+  if (hFind != INVALID_HANDLE_VALUE &&
+      (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
     FindClose(hFind);
     return true;
   }
@@ -174,4 +172,43 @@ std::string Utils::WCharToUTF8(wchar_t *wstr) {
   return std::string();
 }
 
+bool Utils::IsTextUtf8(const char *str,int length) {
+  char endian = 1;
+  bool littlen_endian = (*(char *)&endian == 1);
+
+  size_t i;
+  int bytes_num;
+  unsigned char chr;
+
+  i = 0;
+  bytes_num = 0;
+  while (i < length) {
+    if (littlen_endian) {
+      chr = *(str + i);
+    } else {  // Big Endian
+      chr = (*(str + i) << 8) | *(str + i + 1);
+      i++;
+    }
+
+    if (bytes_num == 0) {
+      if ((chr & 0x80) != 0) {
+        while ((chr & 0x80) != 0) {
+          chr <<= 1;
+          bytes_num++;
+        }
+        if ((bytes_num < 2) || (bytes_num > 6)) {
+          return false;
+        }
+        bytes_num--;
+      }
+    } else {
+      if ((chr & 0xC0) != 0x80) {
+        return false;
+      }
+      bytes_num--;
+    }
+    i++;
+  }
+  return (bytes_num == 0);
+}
 }  // namespace wxhelper

src/utils.h

@@ -47,6 +47,8 @@ class Utils {
 
   static std::string WCharToUTF8(wchar_t *wstr);
 
+  static bool IsTextUtf8(const char * str,int length) ;
+
   template <typename T1, typename T2>
  static std::vector<T1> split(T1 str, T2 letter) {
     std::vector<T1> arr;